This year in ESS, we will focus on global 21st century issues that threaten our beautiful planet. It will be the responsibility of this and future generations to find solutions to these problems through raising awareness, discovering new technology, rewarding innovation, and by passing legislation. This blog will reflect the voice of every earth and space science student in Ms. B's classes during the 2013-2014 school year.
I think that it would be possible for the discovery of new stars if the universe was not expanding. For example, new species of animals are found ever year on earth, but the earth is virtually the same size as it was millions of years ago. So the discovery of new stars does not mean the universe is expanding
We found out that the universe was expanding a while ago when Edwin Hubble used Albert Einstein's theory of relativity to measure the velocity of big galaxies thinking they were all the same, but he found that they were different and were moving away from us. From then on scientists have been observing galaxies, stars, other planets, and many other celestial bodies to see that they are in fact moving away from us. Through observation we know the universe is expanding.
I imagine that would be difficult to record data because we are constantly moving as well. So being able to judge whether the other galaxies and stars are moving or it is earth moving might mess up the data.
Astronomers believe that the universe is expanding - that all points in the universe are getting farther apart all the time. It's not that stars and galaxies are getting bigger; rather, the space between all objects is expanding with time. http://skyserver.sdss.org/dr1/en/proj/basic/universe/
The two main pieces of evidence are the redshift, and looking that the distance between a pair of galaxies (milky way excluded) are farther away from each other http://www.esa.int/Our_Activities/Space_Science/What_is_red_shift
Astronomers believe that the universe is expanding - that all points in the universe are getting farther apart all the time. It's not that stars and galaxies are getting bigger; rather, the space between all objects is expanding with time.http://skyserver.sdss.org/dr1/en/proj/basic/universe/
The expansion of the universe was discovered in 1929 by American astronomer Edwin Hubble. He used the 100-inch telescope on Mount Wilson in California - at the time, the largest telescope in the world - to measure the distances to other galaxies.
We already know that galaxies are going away from each other. It make a reason to show universe is expending. References Curious About Astronomy: How do we know if the universe will keep expanding forever? (n.d.). Retrieved from http://curious.astro.cornell.edu/question.php?number=63 The Expanding Universe. (n.d.). Retrieved from http://skyserver.sdss.org/dr1/en/astro/universe/universe.asp
In 1929 Edwin Hubble discovered that the universe was expanding through measuring the red light coming off of distant objects (like galaxies). His conclusion came from a combination of work from multiple scientists who had all had theories about the expansion of the universe but Hubble was the first to prove it and measure how fast distant galaxies were moving away from earth.
The Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/universe/.
One of the theories Hubble based his conclusion on was Albert Einstein's Theory of Relativity. Did you know that's even though Einstein understood the universe was changing he didn't know whether it was expanding or contratcting? He simply knew the universe was not and could not remain static. It was only until other scientists, such as a Hubble, found that the universe was expanding that Einstein understood. He called this his "biggest blunder."
Because scientist know that galaxies and stars are growing farther apart which could only result in the universe expanding or stretching http://skyserver.sdss.org/dr1/en/proj/basic/universe/
Scientists know galaxies are moving away from us which causes the universe to expand. The space in between the galaxies stretching and the farther away a galaxy is the more space there is to stretch so the faster the galaxy seems to be moving away from us.
We know the universe is expaning because of scientist using albert einsteins theory of relitivity. they are able to see that galaxies are moving further and further away from each other and the farthest ones are moving the fastest. http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
To be able to tell there's this thing called the Hubble Diagram. It gives scientists a measurement of the distance of the planets and the speed that they are going at. Before it, it was really hard to tell since the universe is such a large scale. http://cas.sdss.org/dr7/en/proj/basic/universe/howdoweknow.asp
There is a substantial amount of evidence to suggest since the galaxies are moving away from each other, there must be some force that is stretching the universe. Even though this is really circumstantial, evidence continues to pile up as time continues to pass by.
Binns, Correy. "How Do Scientists Know the Universe Is Expanding?" LiveScience.com. Live Science, 16 Nov. 2012. Web. 09 Sept. 2013. .
People know the universe is expanding because they know that galaxies are getting farther away from us even though they are not moving. It's the spaces between the galaxies that are expanding.
"Curious About Astronomy: What is the universe expanding into?." Curious About Astronomy? Ask an Astronomer. N.p., n.d. Web. 9 Sept. 2013.
If the universe is expanding, then at some time in the past, it must have started from a single point. This point is called the "Big Bang" is was a small point and it was very dense and extremely hot. This point began the whole universe that we know today as the "Milky Way." In 1915 scientist Albert Einstein was the first came up with The General Theory of Relativity, which explained how gravity works. In 1929 scientist Erwin Hubble combined other scientist work and, used a telescope in Pasadena, CA, to confirme that the Earth is expanding.
The Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/universe
How do we know the universe is expanding? The likelyhood of the universe remaining stationary is as likely as a pencil balancing on its point, possible but very unlikely and unreliable. We are also able to tell through the Hubble and Kepler telescopes proving galaxies we have been studying are moving away. (http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html)
We know that the universe is expanding because the universe had to start from a single point if we are to believe the Big Bang, so it must still be expanding, but it's not something that we would simply observe.
Because of Edwin Hubble in 1929, using Einsteins theory of relativity. Recorded the further galaxies closest to earth through a telescope. He noticed that the further a galaxy was from us the faster it moved away. The Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/
The expansion of the universe was discovered by Edwin Hubble in 1929. He discovered by looking the the wave length of the other galaxies that they were moving away. This wavelength is called a redshift, because red is the color of least energy on the color spectrum. The expanding galaxies appear red on the color spectrum because they are slowly moving away from our perspective on Earth. The Expanding Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/astro/universe
The expansion was discovered by Edwin Hubble when he took measurements of other galaxies. Comparisons between his calculations and those of other scientists differed which proved the expansion of the universe. Data that proves the discovery can be found in the Hubble Diagram.
The Universe - How do We Know?. (2012, April 2). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://cas.sdss.org/dr7/en/proj/basic/universe/howdoweknow.asp
We know the universe is expanding because Edwin Hubble first discovered the expansion of the space between the galaxies. Einstein's theory of gravity also predicted this, though he didn't believe it himself.
Brief Answers to Cosmic Questions. (n.d.). Center for Astrophysics. Retrieved September 9, 2013, from http://www.cfa.harvard.edu/seuforum/faq.htm#m2
Vesto Slipher discovered several "fuzzy objects" while studying the night sky in Arizona. He noticed that these objects, nebulas, had a bright red glow. According to his previous calculations, this light was uncharacteristicly red. When a star gives off light with significant levels of red, it indicates that the star is moving away. This discovery, along with research from other scientists and mathematicians such as Albert Einstein and Edwin Hubble, proved that the universe is expanding. This tactic is stil utilized today, continually proving that objects in space are moving away from each other.
SDSS. (n.d.). The Universe. SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/universe
albert einstein had first proposed that the universe was either contracting or expanding, and eventually while hubble was collecting data on the velocities of distant planets, he discovered that things were actually moving away from us and today, with all the advanced technology this has been proven to be true.
Binns, Corey (2012, Nov 16). How Do Scientists Know rhe Universe is Expanding? Retrieved from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
The expansion of the universe was discovered in 1929, when American astronomer Edwin Hubble brought together many scientists' work. In 1915, Albert Einstein wrote the General Theory of Relativity, which explained how gravity works. When Einstein applied his new theory to the whole universe, he found that it predicted that space should not be stable; it should either be expanding or contracting. Einstein refused to believe his own equations - like all astronomers for thousands of years, he had assumed that the size of the universe was not changing. http://skyserver.sdss.org/dr1/en/proj/basic/universe/
We know that the universe is expanding because of a few reasons. First off, the astronomer Vesto Slipher saw that there were more galaxies going away from us than approaching us. We then saw an increase in wavelength and noticed that it was due to expansion of the fabric of space over the years that the light was traveling. Hubble then discovered that our expansion factor was proportional to the distance light traveled, or equivalently, to how far back in time you looked, meaning the universe was smaller earlier in time.
Takahashi, Y. (n.d.). Big Bang: How Did the Universe Begin? Retrieved from http://www.ugcs.caltech.edu/~yukimoon/BigBang
Astronomers believe that the universe is expanding because all points in the universe are getting farther apart all the time. The space between all objects in space is expanding over time. If the universe is expanding, then at some time in the past, it must have started from a single point and the astronomers believe that the universe will keep expanding.
Binns, C. (2012, November 16). How do scientists know the universe is expanding?. Retrieved from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
The farther away a galaxy is the faster it is moving away from us. This fits in very well with Einstein's predictions. The galaxies seem to be receding from us because the entire universe is getting larger,the space in between the galaxies is stretching.And the farther away a galaxy is the more space there is to stretch so the faster the galaxy appears to move away from us. "How Do Scientists Know the Universe Is Expanding?" LiveScience.com. N.p., n.d. Web. 09 Sept. 2013.
Astronomers believe that the universe is expanding - that all points in the universe are getting farther apart all the time. It's not that stars and galaxies are getting bigger; rather, the space between all objects is expanding with time.Also it is believed that dark energy is pushing galaxies farther apart. http://skyserver.sdss.org/dr1/en/proj/basic/universe/
It is believed that the universe is expanding. The objects that are a part of the universe are moving away from each other (galaxies). They aren't getting bigger, but the space between them is increasing with time, shown by their red shifts.
"The Universe." The Universe. N.p., n.d. Web. 09 Sept. 2013.
The space between the planets and galaxies are expanding because using the Hubble telescope he could measure the distance and tell they were expanding.
In fact, the universe is getting even bigger. Astronomers believe that the universe is expanding that all points in the universe are getting farther apart all the time. It's not that stars and galaxies are getting bigger; rather, the space between all objects is expanding with time.
The Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic
For a long time we didn't know the universe was expanding. The universe is expanding all around us, yet it is happening at such a large scale that near impossible to notice it from Earth. The expansion of the universe was discovered in 1929 by an American astronomer Edwin Hubble. He used the 100-inch telescope on Mount Wilson in California. At the time, it was the largest telescope in the world. He used this telescope to measure the distances to other galaxies. He combined his calculated distances with another scientist's measurements of the speed with which galaxies were moving away from us. He created a graph of distance vs. velocity for the universe (which is now called a Hubble Diagram.) Judging from his graph, he realized that the universe must be expanding. "The Universe - Distances." SDSS SkyServer DR7. N.p., n.d. Web. 9 Sept. 2013. <http://cas.sdss.org/dr7/en/proj/basic/univers
we know that the universe is expanding because scientists have observed that galaxies are moving further apart from each other, and the furthest galaxies are the ones moving the fastest
What does it mean when they say the universe is expanding?(Everyday Mysteries:Fun Science Facts fromthe Library of Congress). (n.d.). Library of Congress Home. Retrieved September 9, 2013, from http://www.loc.gov/rr/scitech/mysteries/universe.html
Einsteins theory of General Relativity (GR) in 1915 states the the universe is either expanding or contracting. Edwin Hubble discovered that in fact the universe is expanding. Hubble plotted redshift against relative distance and as the linear shirt went up he found the numbers were increasing this can only mean one thing that they universe is expanding. The reason the universe has not collapsed is because it has been expanding since the moment of its creation.
Carnegie Institution for Science (2013) 1929: Edwin Hubble Discovers the Universe is Expanding http://cosmology.carnegiescience.edu/timeline/1929
Astronomers belief that the universe is expanding by observing that all points in the universe are getting farther apart all the time. It's not that the stars and galaxies are getting bigger, but rather that the space between all objects is expanding with time.
Edwin Hubble combined his distances with another scientist's measurements of the speed with which galaxies were moving away from us. He created a graph of distance vs. velocity for the universe, just like the graph you created for the balloon. Looking at his graph, he realized that the universe must be expanding. Today, we call such a graph a Hubble Diagram.
Scientists have discovered that the spaces between all galaxies are "stretching" so we can draw a conclusion that the universe is expanding.
Binns, C. (2012, November 16). How Do Scientists Know the Universe is Expanding? | LiveScience . Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
For a long time, people really had no idea we were expanding. It happens over such a large scale that no one started noticing until relatively recently. Albert Einstien wrote the general theory of relativity (how gravity works) and because of this we were able to apply this theory to the whole universe, thus showing us that the universe expands.
Since the Hubble telescope science has observed millions of galaxies. And other equipment and verified his results. Except for a few galaxies close to us,science has proved that every galaxy is moving away from us. The space between the galaxies is stretching! And the farther away a galaxy is the more space there is to stretch so the faster the galaxy appears to move away from us. References How Do Scientists Know the Universe is Expanding? | LiveScience . (n.d.). Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
Edwin Hubble discovered that the universe was expanding through measuring the red light coming off of distant objects in 1929. This discovery came from work from multiple scientists who had all had theories too, but Hubble was the first to prove it and measure how fast other galaxies were moving away.
The Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/universe/.
Einstein's theory of relativity, the red light given off by nebulae, Hubble's diagram, and the discovery of dark energy all point to the fact that the universe is still expanding. Einstein found that the universe should not be stable. It should be either expanding or contracting. Vesto Slipher measured the speed of the nebulae using their redness and found that they are moving away from the Earth, as did Hubble in his diagram with galaxies.
The Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/universe/
Astronomers believe that the universe is expanding - that all points in the universe are getting farther apart all the time. It's not that stars and galaxies are getting bigger; rather, the space between all objects is expanding with time. The Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/
We know that the universe is expanding because of the Hubble telescope.
Kruszelnicki, Karl S.. "How do we know how fast the universe is expanding? › Dr Karl's Great Moments In Science (ABC Science)." ABC.net.au. N.p., 13 Apr. 2013. Web. 9 Sept. 2013. .
The constant discoveries of new stars, galaxies proves that the universe is expanding. the main piece of evidence is the redshift from the different galaxies. Also, because scientists have discovered that the galaxy and stars are further away from each other.
Binns, Correy. "How Do Scientists Know the Universe Is Expanding?" LiveScience.com. Live Science, 16 Nov. 2012. Web. 09 Sept. 2013.
Albert Einstein had developed his theory of General Relativity in 1915. The theory predicts that the whole universe is either expanding or contracting . To have the universe staying static is like a pencil balanced on its point, possible but very unlikely and not liable to last for very long.In 1929 the astronomer Edwin Hubble measured the velocities of a large selection of galaxies. He expected that about equal numbers would be moving toward and away from us.
Astronomer Edwin Hubble in the 1920's was the first to observe that galaxies seemed to be expanding, and it's also supported by Einsteins theory of gravity. Hubble observed that distant galaxies were moving farther away from Earth by observing the stars and the sky.
Astronomers have claimed that galaxies seem to be expanding, and the expanding of the universe is predicted in einsteinium theory of relativity. However, today some believe that the universe is not expanding at all, and instead the mass of everything in the universe is increasing, causing the belief that the universe has been infinitely expanding since the beginning.
The discovery that the earth is constantly expanding occurred fairly recently. Researchers discovered the nearly 80 years ago. Vesto Slipher, an astronomer, was the first to realize the expansion. "Through his telescope, he examined several of faint, fuzzy objects called "nebulae," from the Greek word for "cloud." He discovered that light given off by the nebulae was redder than it should have been. Slipher knew that when an object's light looked too red, that meant it was moving away from Earth. He calculated the nebulae's speeds from the redness of their light, and found they were all moving away from us incredibly quickly: one, the Sombrero Nebula, moved away at 2.5 million miles per hour!"
We know this is happening because of General Relativity which was introduced by Albert Einstein. It exhibits the idea that the whole universe is expanding.
How Do Scientists Know the Universe is Expanding? | LiveScience . (n.d.). Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
Scientist can prove the universe is expanding using a simple physics concept. When an object moves towards you it will have a slight blue color. When it is moving away the object will have a slight red tint to it. The galaxies in the universe have a red tint which means they are moving away from us.
Binns, Correy. "How Do Scientists Know the Universe Is Expanding?" LiveScience.com. Live Science, 16 Nov. 2012. Web. 09 Sept. 2013.
Albert Einstein believed that the universe is either expanding or contracting. Since then, scientists have tested this theory, and have proved it to be right. In 1929, Edwin Hubble discovered that almost all galaxies are moving away from us. Since the time of Hubble scientists have observed millions of galaxies and verified his results; almost all the galaxies are moving away from us. The galaxies seem to be receding from us because the entire universe is getting larger. The space in between the galaxies is stretching!
Binns, C. (n.d.). How Do Scientists Know the Universe is Expanding? | LiveScience . Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
The theory predicts the whole universe is expanding. In 1929 the astronomer Edwin Hubble measured the velocities of a large selection of galaxies. He expected that about equal numbers would be moving toward and away from us. After all, the Earth isn't a particularly special place in the universe.
How Do Scientists Know the Universe is Expanding? | LiveScience . (n.d.).Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
Albert Einstein had the theory in 1915 that the universe is either expanding or contracting. In 1929 Hubble measured the velocities of a large selection of galaxies. Hubble discovered that the galaxies are expanding away from us. Since then scientist have observed millions of galaxies with better equipment and verified his results. How Do Scientists Know the Universe is Expanding? | LiveScience . (n.d.). Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
We know that the universe is expanding thanks to Edwin Hubble. He compiled other scientists' observations with his own and created the Hubble diagram which shows that the redness of a galaxy's light and the speed that the galaxy moved farther from Earth increased with its distance from Earth. In The Universe. Retrieved Sep. 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/universe/
The space of all objects is getting larger and larger through time. The stars and galaxies are not getting bigger, it's the space between them getting larger. http://skyserver.sdss.org/dr1/en/proj/basic/universe/
Through the theory of relativity created by Albert Einstein we have learned the the universe is either expanding or contracting. Edwin Hubble measured the velocity of some sections in the galaxy and lerned that equal numbers were moving away and toward us.
How Do Scientists Know the Universe is Expanding? | LiveScience . (n.d.). Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
Albert Einstein's theory of General Relativity which predicts that the whole universe is either expanding or contracting is the widely accepted answer to why the universe is expanding. There really isn't any other alternative. To have the universe staying static is extremely unlikely. http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
The universe continually expanding was proved by Hubble from Einstein's theory of relativity. Measuring the velocities of surrounding galaxies and ours then observing the drifting of them apart from one another.
Speed of Universe's Expansion Measured Better Than Ever: Scientific American. (n.d.). Science News, Articles and Information | Scientific American. Retrieved September 9, 2013, from http://www.scientificamerican.com/article.cfm?id=speed-of-universes-expansion
We know the universe is expanding. It's just expanding at such a huge rate, it is hard to spot from earth.
The Universe - How do We Know?. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://cas.sdss.org/dr7/en/proj/basic/universe/howdoweknow.asp
Albert Einstein applied his theory of General Relativity and found something remakrable. He found that the universe was either expanding or contracting. In 1929, Hubble measured the velocities of a large section of galaxies. He found that equal numbers were moving towards and away from us. http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
Expansion of the universe was discovered by Edwin Hubble when he measured the redshifts of galaxies and their relative distance beased on the brightness of "various stars called Cephids." When Hubble plotted the data he had bother he observed that the redshifts of galaxies increased as a linear function of their distance. Redshift is an increase in wavelength across space, the increasing wavelength proves that the universe is expanding since the point of origin for the photons remain the same. Redshift. (n.d.). University of Virginia Department of Astronomy. Retrieved September 9, 2013, from http://www.astro.virginia.edu/~jh8h/glossary/redshift.htm, The Expanding Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/astro/universe/universe.asp
A group of scientists were trying to prove that the universe was slowing down, but instead found the universe was expanding when they were observing a type Ia supernovae. They measured their brightness to judge their distance to the red shifts of their home galaxies, which researchers use to help measure how fast the universe was expanding at different time periods. NASA's Cosmicopia -- Ask Us - Space Physics - Cosmology - Expansion of the Universe. (n.d.). NASA's Cosmicopia -- Home. Retrieved September 9, 2013, from http://helios.gsfc.nasa.gov/qa_sp_ex.html
We assume the universe is expanding because of Albert Einstein's theory of general relativity. It's very well tested and the most likely theory for us to believe. How Do Scientists Know the Universe is Expanding? | LiveScience ." Science News – Science Articles and Current Events | LiveScience . N.p., n.d. Web. 9 Sept. 2013. .
We know the universe is expanding because of Albert Einstein's theory of relativity. And we also have the evidence from red shifts that prove that the space in between the galaxies is increasing. Through Hubble's telescope we see evidence of this as well. " How Do Scientists Know the Universe is Expanding? | LiveScience ." Science News – Science Articles and Current Events | LiveScience . N.p., n.d. Web. 9 Sept. 2013. .
In 1929 the astronomer Edwin Hubble measured the velocities of a large galaxies. He discovered that the galaxies were moving away from each other. Many experiments have been made to confirm the galaxies are receding because the entire universe is getting larger. And the farther away a galaxy is the more space there is to stretch so the faster the galaxy appears to move away. Over the past half-century astronomers have observed many other facts about the universe that all point to the fact that the universe is expanding. http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
Cosmologist claims Universe may not be expanding : Nature News & Comment. (n.d.). Nature Publishing Group : science journals, jobs, and information. Retrieved September 9, 2013, from http://www.nature.com/news/cosmologist-claims-universe-may-not-be-expanding-1.13379
We make assumptions that the universe is expanding because of Albert Einstein's theory of general relativity. The evidence from the red shifts also help us come up with this idea of the expansion. http://skyserver.sdss.org/dr1/en/astro/universe/universe.asp
The expansion of the universe was a discovery of the late Edwin Hubble. In 1929, he noticed that the red shift in the galaxy was directly proportional to the distance between the milky way galaxy and earth. Hubble used his findings to conclude that objects that were farther away, were moving away faster.
Web Link http://www.pbs.org/wgbh/aso/databank/entries/dp29hu.html
A scientist in the 1920s discovered that the universe was expanding. Edwin Hubble measured the change in frequency due to galaxy speed. He found that all particular galaxies were getting further and further from us.
It all started with the Big Bang,no matter where you look in the sky nearly all galaxies are moving away from us. The farther away a given galaxy is the faster it is moving away, which is proof that the universe is growing larger.
scientists have observed that there are galaxies drifting further from us at a proportional rate, so the galaxies themselves and the planets within them aren't being stretched but the galaxies near other galaxies are drifting apart. To prove this, though, math magicians tested the redshift of light being emitted from objects and how distance effected the redshift. When they compared data from this experiment to the redshift of galaxies the only explanation there is that it is expanding.
The Expanding Universe. (n.d.). SDSS SkyServer. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/astro/universe/universe.asp
In 1920 ish Edwin Hubble ,ensured the frequency and speed of out planet. Our planet is expanding not slow but vary fast in the outside space that exposes us. http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/011021a.html
With the telescopes we have nowadays, scientists are able to look deep into space and discover that other planets, stars, and galaxies are moving farther away as time goes on.
We know that the universe is expanding because of the simple fact that the galaxies are moving farther apart from each other.
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteWe find more and more galaxies and other stars around us being born
ReplyDeletehttp://skyserver.sdss.org/dr1/en/proj/basic/universe/
DeleteThe main piece of evidence is the redshift from distant galaxies. This is a result of the Doppler effect the galaxies are moving away from us
ReplyDeletehttp://curious.astro.cornell.edu/question.php?number=63
DeleteThe constant discoveries of new stars, galaxies, etc. proves that the universe is expanding
ReplyDeletehttp://skyserver.sdss.org/dr1/en/proj/basic/universe/
DeleteI think that it would be possible for the discovery of new stars if the universe was not expanding. For example, new species of animals are found ever year on earth, but the earth is virtually the same size as it was millions of years ago. So the discovery of new stars does not mean the universe is expanding
DeleteAdding onto yours Dustin, That Many scientists have shown evidence that the Universse is expanding.
ReplyDeleteYeah that makes a lot of sence
DeleteWe found out that the universe was expanding a while ago when Edwin Hubble used Albert Einstein's theory of relativity to measure the velocity of big galaxies thinking they were all the same, but he found that they were different and were moving away from us. From then on scientists have been observing galaxies, stars, other planets, and many other celestial bodies to see that they are in fact moving away from us. Through observation we know the universe is expanding.
ReplyDeletehttp://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
DeleteScientist can look through telescopes and see that other galaxies are getting farther away, and the farthest ones away are moving faster
ReplyDeleteI imagine that would be difficult to record data because we are constantly moving as well. So being able to judge whether the other galaxies and stars are moving or it is earth moving might mess up the data.
DeleteScientist see this by measuring the red light coming off of other galaxies and plotting the points.
DeleteAstronomers believe that the universe is expanding - that all points in the universe are getting farther apart all the time. It's not that stars and galaxies are getting bigger; rather, the space between all objects is expanding with time.
ReplyDeletehttp://skyserver.sdss.org/dr1/en/proj/basic/universe/
The Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/
DeleteThe two main pieces of evidence are the redshift, and looking that the distance between a pair of galaxies (milky way excluded) are farther away from each other
ReplyDeletehttp://www.esa.int/Our_Activities/Space_Science/What_is_red_shift
Astronomers believe that the universe is expanding - that all points in the universe are getting farther apart all the time. It's not that stars and galaxies are getting bigger; rather, the space between all objects is expanding with time.http://skyserver.sdss.org/dr1/en/proj/basic/universe/
ReplyDeleteThe expansion of the universe was discovered in 1929 by American astronomer Edwin Hubble. He used the 100-inch telescope on Mount Wilson in California - at the time, the largest telescope in the world - to measure the distances to other galaxies.
ReplyDeleteWe already know that galaxies are going away from each other. It make a reason to show universe is expending.
ReplyDeleteReferences
Curious About Astronomy: How do we know if the universe will keep expanding forever? (n.d.). Retrieved from http://curious.astro.cornell.edu/question.php?number=63
The Expanding Universe. (n.d.). Retrieved from http://skyserver.sdss.org/dr1/en/astro/universe/universe.asp
In 1929 Edwin Hubble discovered that the universe was expanding through measuring the red light coming off of distant objects (like galaxies). His conclusion came from a combination of work from multiple scientists who had all had theories about the expansion of the universe but Hubble was the first to prove it and measure how fast distant galaxies were moving away from earth.
ReplyDeleteThe Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/universe/.
One of the theories Hubble based his conclusion on was Albert Einstein's Theory of Relativity. Did you know that's even though Einstein understood the universe was changing he didn't know whether it was expanding or contratcting? He simply knew the universe was not and could not remain static. It was only until other scientists, such as a Hubble, found that the universe was expanding that Einstein understood. He called this his "biggest blunder."
DeleteBecause scientist know that galaxies and stars are growing farther apart which could only result in the universe expanding or stretching http://skyserver.sdss.org/dr1/en/proj/basic/universe/
ReplyDeleteScientists know galaxies are moving away from us which causes the universe to expand. The space in between the galaxies stretching and the farther away a galaxy is the more space there is to stretch so the faster the galaxy seems to be moving away from us.
ReplyDeletehttp://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
DeleteThe main piece of evidence is the redshift from distant galaxies. This is a result of the Doppler effect the galaxies are moving away from us
ReplyDeletehttp://www.exploratorium.edu/hubble/tools/doppler.html
We know the universe is expaning because of scientist using albert einsteins theory of relitivity. they are able to see that galaxies are moving further and further away from each other and the farthest ones are moving the fastest. http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
ReplyDelete
ReplyDeleteTo be able to tell there's this thing called the Hubble Diagram. It gives scientists a measurement of the distance of the planets and the speed that they are going at. Before it, it was really hard to tell since the universe is such a large scale. http://cas.sdss.org/dr7/en/proj/basic/universe/howdoweknow.asp
There is a substantial amount of evidence to suggest since the galaxies are moving away from each other, there must be some force that is stretching the universe. Even though this is really circumstantial, evidence continues to pile up as time continues to pass by.
ReplyDeleteBinns, Correy. "How Do Scientists Know the Universe Is Expanding?" LiveScience.com. Live Science, 16 Nov. 2012. Web. 09 Sept. 2013. .
People know the universe is expanding because they know that galaxies are getting farther away from us even though they are not moving. It's the spaces between the galaxies that are expanding.
ReplyDelete"Curious About Astronomy: What is the universe expanding into?." Curious About Astronomy? Ask an Astronomer. N.p., n.d. Web. 9 Sept. 2013.
If the universe is expanding, then at some time in the past, it must have started from a single point. This point is called the "Big Bang" is was a small point and it was very dense and extremely hot. This point began the whole universe that we know today as the "Milky Way." In 1915 scientist Albert Einstein was the first came up with The General Theory of Relativity, which explained how gravity works. In 1929 scientist Erwin Hubble combined other scientist work and, used a telescope in Pasadena, CA, to confirme that the Earth is expanding.
ReplyDeleteThe Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/universe
How do we know the universe is expanding?
ReplyDeleteThe likelyhood of the universe remaining stationary is as likely as a pencil balancing on its point, possible but very unlikely and unreliable. We are also able to tell through the Hubble and Kepler telescopes proving galaxies we have been studying are moving away. (http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html)
This is a very good point. I researched the same idea.
DeleteAlso, the farther galaxies are, the faster their velocity. The interesting point is that this can be observed from any point in the universe.
DeleteWe know that the universe is expanding because the universe had to start from a single point if we are to believe the Big Bang, so it must still be expanding, but it's not something that we would simply observe.
ReplyDelete"The Universe." SDSS SkyServer DR7. N.p., n.d. Web. 9 Sept. 2013. .
Because of Edwin Hubble in 1929, using Einsteins theory of relativity. Recorded the further galaxies closest to earth through a telescope. He noticed that the further a galaxy was from us the faster it moved away.
ReplyDeleteThe Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/
I agree completely kleid
DeleteThe expansion of the universe was discovered by Edwin Hubble in 1929. He discovered by looking the the wave length of the other galaxies that they were moving away. This wavelength is called a redshift, because red is the color of least energy on the color spectrum. The expanding galaxies appear red on the color spectrum because they are slowly moving away from our perspective on Earth.
ReplyDeleteThe Expanding Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/astro/universe
The expansion was discovered by Edwin Hubble when he took measurements of other galaxies. Comparisons between his calculations and those of other scientists differed which proved the expansion of the universe. Data that proves the discovery can be found in the Hubble Diagram.
ReplyDeleteThe Universe - How do We Know?. (2012, April 2). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://cas.sdss.org/dr7/en/proj/basic/universe/howdoweknow.asp
We know the universe is expanding because Edwin Hubble first discovered the expansion of the space between the galaxies. Einstein's theory of gravity also predicted this, though he didn't believe it himself.
ReplyDeleteBrief Answers to Cosmic Questions. (n.d.). Center for Astrophysics. Retrieved September 9, 2013, from http://www.cfa.harvard.edu/seuforum/faq.htm#m2
Vesto Slipher discovered several "fuzzy objects" while studying the night sky in Arizona. He noticed that these objects, nebulas, had a bright red glow. According to his previous calculations, this light was uncharacteristicly red. When a star gives off light with significant levels of red, it indicates that the star is moving away. This discovery, along with research from other scientists and mathematicians such as Albert Einstein and Edwin Hubble, proved that the universe is expanding. This tactic is stil utilized today, continually proving that objects in space are moving away from each other.
ReplyDeleteSDSS. (n.d.). The Universe. SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/universe
albert einstein had first proposed that the universe was either contracting or expanding, and eventually while hubble was collecting data on the velocities of distant planets, he discovered that things were actually moving away from us and today, with all the advanced technology this has been proven to be true.
ReplyDeleteBinns, Corey (2012, Nov 16). How Do Scientists Know rhe Universe is Expanding? Retrieved from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
DeleteThe expansion of the universe was discovered in 1929, when American astronomer Edwin Hubble brought together many scientists' work. In 1915, Albert Einstein wrote the General Theory of Relativity, which explained how gravity works. When Einstein applied his new theory to the whole universe, he found that it predicted that space should not be stable; it should either be expanding or contracting. Einstein refused to believe his own equations - like all astronomers for thousands of years, he had assumed that the size of the universe was not changing. http://skyserver.sdss.org/dr1/en/proj/basic/universe/
ReplyDeleteWe know that the universe is expanding because of a few reasons. First off, the astronomer Vesto Slipher saw that there were more galaxies going away from us than approaching us. We then saw an increase in wavelength and noticed that it was due to expansion of the fabric of space over the years that the light was traveling. Hubble then discovered that our expansion factor was proportional to the distance light traveled, or equivalently, to how far back in time you looked, meaning the universe was smaller earlier in time.
ReplyDeleteTakahashi, Y. (n.d.). Big Bang: How Did the Universe Begin? Retrieved from http://www.ugcs.caltech.edu/~yukimoon/BigBang
Astronomers believe that the universe is expanding because all points in the universe are getting farther apart all the time. The space between all objects in space is expanding over time. If the universe is expanding, then at some time in the past, it must have started from a single point and the astronomers believe that the universe will keep expanding.
ReplyDeleteBinns, C. (2012, November 16). How do scientists know the universe is expanding?. Retrieved from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
The farther away a galaxy is the faster it is moving away from us. This fits in very well with Einstein's predictions. The galaxies seem to be receding from us because the entire universe is getting larger,the space in between the galaxies is stretching.And the farther away a galaxy is the more space there is to stretch so the faster the galaxy appears to move away from us. "How Do Scientists Know the Universe Is Expanding?" LiveScience.com. N.p., n.d. Web. 09 Sept. 2013.
ReplyDeleteAstronomers believe that the universe is expanding - that all points in the universe are getting farther apart all the time. It's not that stars and galaxies are getting bigger; rather, the space between all objects is expanding with time.Also it is believed that dark energy is pushing galaxies farther apart.
ReplyDeletehttp://skyserver.sdss.org/dr1/en/proj/basic/universe/
It is believed that the universe is expanding. The objects that are a part of the universe are moving away from each other (galaxies). They aren't getting bigger, but the space between them is increasing with time, shown by their red shifts.
ReplyDelete"The Universe." The Universe. N.p., n.d. Web. 09 Sept. 2013.
The space between the planets and galaxies are expanding because using the Hubble telescope he could measure the distance and tell they were expanding.
ReplyDeleteIn fact, the universe is getting even bigger. Astronomers believe that the universe is expanding that all points in the universe are getting farther apart all the time. It's not that stars and galaxies are getting bigger; rather, the space between all objects is expanding with time.
ReplyDeleteThe Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic
For a long time we didn't know the universe was expanding. The universe is expanding all around us, yet it is happening at such a large scale that near impossible to notice it from Earth. The expansion of the universe was discovered in 1929 by an American astronomer Edwin Hubble. He used the 100-inch telescope on Mount Wilson in California. At the time, it was the largest telescope in the world. He used this telescope to measure the distances to other galaxies. He combined his calculated distances with another scientist's measurements of the speed with which galaxies were moving away from us. He created a graph of distance vs. velocity for the universe (which is now called a Hubble Diagram.) Judging from his graph, he realized that the universe must be expanding.
ReplyDelete"The Universe - Distances." SDSS SkyServer DR7. N.p., n.d. Web. 9 Sept. 2013. <http://cas.sdss.org/dr7/en/proj/basic/univers
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ReplyDeletewe know that the universe is expanding because scientists have observed that galaxies are moving further apart from each other, and the furthest galaxies are the ones moving the fastest
ReplyDeleteWhat does it mean when they say the universe is expanding?(Everyday Mysteries:Fun Science Facts fromthe Library of Congress). (n.d.). Library of Congress Home. Retrieved September 9, 2013, from http://www.loc.gov/rr/scitech/mysteries/universe.html
Einsteins theory of General Relativity (GR) in 1915 states the the universe is either expanding or contracting. Edwin Hubble discovered that in fact the universe is expanding. Hubble plotted redshift against relative distance and as the linear shirt went up he found the numbers were increasing this can only mean one thing that they universe is expanding. The reason the universe has not collapsed is because it has been expanding since the moment of its creation.
ReplyDeleteCarnegie Institution for Science (2013) 1929: Edwin Hubble Discovers the Universe is Expanding http://cosmology.carnegiescience.edu/timeline/1929
Will it ever contract?!
DeleteAstronomers belief that the universe is expanding by observing that all points in the universe are getting farther apart all the time. It's not that the stars and galaxies are getting bigger, but rather that the space between all objects is expanding with time.
ReplyDeleteEdwin Hubble combined his distances with another scientist's measurements of the speed with which galaxies were moving away from us. He created a graph of distance vs. velocity for the universe, just like the graph you created for the balloon. Looking at his graph, he realized that the universe must be expanding. Today, we call such a graph a Hubble Diagram.
ReplyDeletehttp://cas.sdss.org/dr7/en/proj/basic/universe/howdoweknow.asp
DeleteScientists have discovered that the spaces between all galaxies are "stretching" so we can draw a conclusion that the universe is expanding.
ReplyDeleteBinns, C. (2012, November 16). How Do Scientists Know the Universe is Expanding? | LiveScience . Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
For a long time, people really had no idea we were expanding. It happens over such a large scale that no one started noticing until relatively recently. Albert Einstien wrote the general theory of relativity (how gravity works) and because of this we were able to apply this theory to the whole universe, thus showing us that the universe expands.
ReplyDeletehttp://skyserver.sdss.org/dr1/en/proj/basic/universe/
Why is it said that the discovery of the universe's expansion occurred in 1929 when the theory of relativity was created in 1915 then?
DeleteSince the Hubble telescope science has observed millions of galaxies. And other equipment and verified his results. Except for a few galaxies close to us,science has proved that every galaxy is moving away from us. The space between the galaxies is stretching! And the farther away a galaxy is the more space there is to stretch so the faster the galaxy appears to move away from us.
ReplyDeleteReferences
How Do Scientists Know the Universe is Expanding? | LiveScience . (n.d.). Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
APA formatting by BibMe.org.
Edwin Hubble discovered that the universe was expanding through measuring the red light coming off of distant objects in 1929. This discovery came from work from multiple scientists who had all had theories too, but Hubble was the first to prove it and measure how fast other galaxies were moving away.
ReplyDeleteThe Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/universe/.
Einstein's theory of relativity, the red light given off by nebulae, Hubble's diagram, and the discovery of dark energy all point to the fact that the universe is still expanding. Einstein found that the universe should not be stable. It should be either expanding or contracting. Vesto Slipher measured the speed of the nebulae using their redness and found that they are moving away from the Earth, as did Hubble in his diagram with galaxies.
ReplyDeleteThe Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/universe/
This is a very good response to the question. Good job! :)
ReplyDeleteAstronomers believe that the universe is expanding - that all points in the universe are getting farther apart all the time. It's not that stars and galaxies are getting bigger; rather, the space between all objects is expanding with time.
ReplyDeleteThe Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/
We know that the universe is expanding because of the Hubble telescope.
ReplyDeleteKruszelnicki, Karl S.. "How do we know how fast the universe is expanding? › Dr Karl's Great Moments In Science (ABC Science)." ABC.net.au. N.p., 13 Apr. 2013. Web. 9 Sept. 2013. .
The constant discoveries of new stars, galaxies proves that the universe is expanding. the main piece of evidence is the redshift from the different galaxies. Also, because scientists have discovered that the galaxy and stars are further away from each other.
ReplyDeleteBinns, Correy. "How Do Scientists Know the Universe Is Expanding?" LiveScience.com. Live Science, 16 Nov. 2012. Web. 09 Sept. 2013.
Albert Einstein had developed his theory of General Relativity in 1915. The theory predicts that the whole universe is either expanding or contracting . To have the universe staying static is like a pencil balanced on its point, possible but very unlikely and not liable to last for very long.In 1929 the astronomer Edwin Hubble measured the velocities of a large selection of galaxies. He expected that about equal numbers would be moving toward and away from us.
ReplyDeleteAstronomer Edwin Hubble in the 1920's was the first to observe that galaxies seemed to be expanding, and it's also supported by Einsteins theory of gravity. Hubble observed that distant galaxies were moving farther away from Earth by observing the stars and the sky.
ReplyDeletehttp://www.cfa.harvard.edu/seuforum/faq.htm#m4
Astronomers have claimed that galaxies seem to be expanding, and the expanding of the universe is predicted in einsteinium theory of relativity. However, today some believe that the universe is not expanding at all, and instead the mass of everything in the universe is increasing, causing the belief that the universe has been infinitely expanding since the beginning.
ReplyDeletehttp://www.nature.com/news/cosmologist-claims-universe-may-not-be-expanding-1.13379
Because scientist can see that the stars are getting further apart which means the universe is expanding.
ReplyDeletehttp://skyserver.sdss.org/dr1/en/proj/basic/universe/
Also the universe is invite so the space between will always be expanding.
DeleteThe discovery that the earth is constantly expanding occurred fairly recently. Researchers discovered the nearly 80 years ago. Vesto Slipher, an astronomer, was the first to realize the expansion. "Through his telescope, he examined several of faint, fuzzy objects called "nebulae," from the Greek word for "cloud." He discovered that light given off by the nebulae was redder than it should have been. Slipher knew that when an object's light looked too red, that meant it was moving away from Earth. He calculated the nebulae's speeds from the redness of their light, and found they were all moving away from us incredibly quickly: one, the Sombrero Nebula, moved away at 2.5 million miles per hour!"
ReplyDeleteThe Universe." SDSS SkyServer DR7. N.p., n.d. Web. 9 Sept. 2013. .
We know this is happening because of General Relativity which was introduced by Albert Einstein. It exhibits the idea that the whole universe is expanding.
ReplyDeleteHow Do Scientists Know the Universe is Expanding? | LiveScience . (n.d.). Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
Scientist can prove the universe is expanding using a simple physics concept. When an object moves towards you it will have a slight blue color. When it is moving away the object will have a slight red tint to it. The galaxies in the universe have a red tint which means they are moving away from us.
ReplyDeleteBinns, Correy. "How Do Scientists Know the Universe Is Expanding?" LiveScience.com. Live Science, 16 Nov. 2012. Web. 09 Sept. 2013.
Albert Einstein believed that the universe is either expanding or contracting. Since then, scientists have tested this theory, and have proved it to be right. In 1929, Edwin Hubble discovered that almost all galaxies are moving away from us. Since the time of Hubble scientists have observed millions of galaxies and verified his results; almost all the galaxies are moving away from us. The galaxies seem to be receding from us because the entire universe is getting larger. The space in between the galaxies is stretching!
ReplyDeleteBinns, C. (n.d.). How Do Scientists Know the Universe is Expanding? | LiveScience . Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
The theory predicts the whole universe is expanding. In 1929 the astronomer Edwin Hubble measured the velocities of a large selection of galaxies. He expected that about equal numbers would be moving toward and away from us. After all, the Earth isn't a particularly special place in the universe.
ReplyDeleteHow Do Scientists Know the Universe is Expanding? | LiveScience . (n.d.).Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
Albert Einstein had the theory in 1915 that the universe is either expanding or contracting. In 1929 Hubble measured the velocities of a large selection of galaxies. Hubble discovered that the galaxies are expanding away from us. Since then scientist have observed millions of galaxies with better equipment and verified his results.
ReplyDeleteHow Do Scientists Know the Universe is Expanding? | LiveScience . (n.d.). Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
We know that the universe is expanding thanks to Edwin Hubble. He compiled other scientists' observations with his own and created the Hubble diagram which shows that the redness of a galaxy's light and the speed that the galaxy moved farther from Earth increased with its distance from Earth.
ReplyDeleteIn The Universe. Retrieved Sep. 9, 2013, from http://skyserver.sdss.org/dr1/en/proj/basic/universe/
The space of all objects is getting larger and larger through time. The stars and galaxies are not getting bigger, it's the space between them getting larger. http://skyserver.sdss.org/dr1/en/proj/basic/universe/
ReplyDeleteThrough the theory of relativity created by Albert Einstein we have learned the the universe is either expanding or contracting. Edwin Hubble measured the velocity of some sections in the galaxy and lerned that equal numbers were moving away and toward us.
ReplyDeleteHow Do Scientists Know the Universe is Expanding? | LiveScience . (n.d.). Science News – Science Articles and Current Events | LiveScience . Retrieved September 9, 2013, from http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
Albert Einstein's theory of General Relativity which predicts that the whole universe is either expanding or contracting is the widely accepted answer to why the universe is expanding. There really isn't any other alternative. To have the universe staying static is extremely unlikely.
ReplyDeletehttp://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
The universe continually expanding was proved by Hubble from Einstein's theory of relativity. Measuring the velocities of surrounding galaxies and ours then observing the drifting of them apart from one another.
ReplyDeleteSpeed of Universe's Expansion Measured Better Than Ever: Scientific American. (n.d.). Science News, Articles and Information | Scientific American. Retrieved September 9, 2013, from http://www.scientificamerican.com/article.cfm?id=speed-of-universes-expansion
Hubble was able to prove it through observing and using different formulas.
ReplyDeleteWe know the universe is expanding. It's just expanding at such a huge rate, it is hard to spot from earth.
ReplyDeleteThe Universe - How do We Know?. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://cas.sdss.org/dr7/en/proj/basic/universe/howdoweknow.asp
Albert Einstein applied his theory of General Relativity and found something remakrable. He found that the universe was either expanding or contracting. In 1929, Hubble measured the velocities of a large section of galaxies. He found that equal numbers were moving towards and away from us.
ReplyDeletehttp://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
Expansion of the universe was discovered by Edwin Hubble when he measured the redshifts of galaxies and their relative distance beased on the brightness of "various stars called Cephids." When Hubble plotted the data he had bother he observed that the redshifts of galaxies increased as a linear function of their distance. Redshift is an increase in wavelength across space, the increasing wavelength proves that the universe is expanding since the point of origin for the photons remain the same. Redshift. (n.d.). University of Virginia Department of Astronomy. Retrieved September 9, 2013, from http://www.astro.virginia.edu/~jh8h/glossary/redshift.htm, The Expanding Universe. (n.d.). SDSS SkyServer DR7. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/astro/universe/universe.asp
ReplyDeleteA group of scientists were trying to prove that the universe was slowing down, but instead found the universe was expanding when they were observing a type Ia supernovae. They measured their brightness to judge their distance to the red shifts of their home galaxies, which researchers use to help measure how fast the universe was expanding at different time periods.
ReplyDeleteNASA's Cosmicopia -- Ask Us - Space Physics - Cosmology - Expansion of the Universe. (n.d.). NASA's Cosmicopia -- Home. Retrieved September 9, 2013, from http://helios.gsfc.nasa.gov/qa_sp_ex.html
We assume the universe is expanding because of Albert Einstein's theory of general relativity. It's very well tested and the most likely theory for us to believe.
ReplyDeleteHow Do Scientists Know the Universe is Expanding? | LiveScience ." Science News – Science Articles and Current Events | LiveScience . N.p., n.d. Web. 9 Sept. 2013. .
We know the universe is expanding because of Albert Einstein's theory of relativity. And we also have the evidence from red shifts that prove that the space in between the galaxies is increasing. Through Hubble's telescope we see evidence of this as well.
ReplyDelete" How Do Scientists Know the Universe is Expanding? | LiveScience ." Science News – Science Articles and Current Events | LiveScience . N.p., n.d. Web. 9 Sept. 2013. .
In 1929 the astronomer Edwin Hubble measured the velocities of a large galaxies. He discovered that the galaxies were moving away from each other. Many experiments have been made to confirm the galaxies are receding because the entire universe is getting larger. And the farther away a galaxy is the more space there is to stretch so the faster the galaxy appears to move away. Over the past half-century astronomers have observed many other facts about the universe that all point to the fact that the universe is expanding. http://www.livescience.com/32260-how-do-scientists-know-the-universe-is-expanding.html
ReplyDeleteThis comment has been removed by the author.
DeleteThe universe may not be expanding at all.
ReplyDeleteCosmologist claims Universe may not be expanding : Nature News & Comment. (n.d.). Nature Publishing Group : science journals, jobs, and information. Retrieved September 9, 2013, from http://www.nature.com/news/cosmologist-claims-universe-may-not-be-expanding-1.13379
We make assumptions that the universe is expanding because of Albert Einstein's theory of general relativity. The evidence from the red shifts also help us come up with this idea of the expansion. http://skyserver.sdss.org/dr1/en/astro/universe/universe.asp
ReplyDeleteThe expansion of the universe was a discovery of the late Edwin Hubble. In 1929, he noticed that the red shift in the galaxy was directly proportional to the distance between the milky way galaxy and earth. Hubble used his findings to conclude that objects that were farther away, were moving away faster.
ReplyDeleteWeb Link
http://www.pbs.org/wgbh/aso/databank/entries/dp29hu.html
A scientist in the 1920s discovered that the universe was expanding. Edwin Hubble measured the change in frequency due to galaxy speed. He found that all particular galaxies were getting further and further from us.
ReplyDeleteIt all started with the Big Bang,no matter where you look in the sky nearly all galaxies are moving away from us. The farther away a given galaxy is the faster it is moving away, which is proof that the universe is growing larger.
ReplyDeletehttp://answers.yahoo.com/question/index?qid=20080306145130AA3xMaN
scientists have observed that there are galaxies drifting further from us at a proportional rate, so the galaxies themselves and the planets within them aren't being stretched but the galaxies near other galaxies are drifting apart. To prove this, though, math magicians tested the redshift of light being emitted from objects and how distance effected the redshift. When they compared data from this experiment to the redshift of galaxies the only explanation there is that it is expanding.
ReplyDeleteThe Expanding Universe. (n.d.). SDSS SkyServer. Retrieved September 9, 2013, from http://skyserver.sdss.org/dr1/en/astro/universe/universe.asp
In 1920 ish Edwin Hubble ,ensured the frequency and speed of out planet. Our planet is expanding not slow but vary fast in the outside space that exposes us. http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/011021a.html
ReplyDeleteWith the telescopes we have nowadays, scientists are able to look deep into space and discover that other planets, stars, and galaxies are moving farther away as time goes on.
ReplyDeletehttp://www.physicsforums.com/showthread.php?t=397902